Summary: A Visualization Model Supporting an Efficient Context
Resumption in Collaboration Environments
Liliana Ardissono, Gianni Bosio, and Marino Segnan
Dipartimento di Informatica, Universit`a di Torino, Italy
WWW home page: http://www.di.unito.it/ liliana,
Abstract. Activity awareness support is a key feature for helping people to re-
sume the state of their collaborations when switching among different tasks.
This paper proposes a visualization model supporting an incremental access to
information, from an overview of the state of the user's activity contexts to the
details about the events occurred in each of them. The higher visualization layer
is represented as a tag cloud and provides a general view of the degree of activity
occurred in each context. The other levels are projections on the event history
focused on specific perspectives; e.g., general collaboration, task or actor.
A user study showed that our visualization model outperforms standard aware-
ness spaces which provide a direct access to awareness events because it enables
users to retrieve the relevant information quicker and more precisely.
Keywords: activity awareness support, collaboration environments, information
visualization, Web 2.0.